[FFmpeg-user] Encode lossless Dirac?

Peter B. pb at das-werkstatt.com
Tue Nov 22 11:55:49 CET 2011

Carl Eugen Hoyos wrote:
> Afaik, this was defined in 1.0.7, what does
> "pkg-config --modversion schroedinger-1.0" report?
> (I suspect you - also - have to backport the development package.)
pkg-config --modversion schroedinger-1.0


I've now compiled ffmpeg's current git-version with libschroedinger
1.0.9 on Debian Squeeze, because libschroedinger v1.0.10 on Lenny
required ORC > 0.4.10 (so I gave up).

Interestingly, with libdirac (pkgconfig --modversion: 1.0.0), "-qscale
0" works, but on Squeeze with libdirac (pkgconfig --modversion: 1.0.2),
it doesn't work anymore.

The command working fine on Lenny:
ffmpeg -i input-ffv1.avi -an -vcodec libdirac -qscale 0 dirac-0.mkv

Again throws the error:
qscale must be > 0.0 and <= 255"

Same for:
ffmpeg -i input-ffv1.avi -an -vcodec libschroedinger -qscale 0 dirac-0.mkv

Now, I'm really confused... :(


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